Rolls-Royce was a manufacturer of high luxury automobiles.
In Timeline 2 (the "Lone Pine" timeline), on October 27, 1985, Marty McFly was racing Needles in his Toyota Hilux. He slammed into a Rolls-Royce Silver Cloud III and broke his hand, preventing him from ever playing the guitar again. The owner of the Rolls-Royce pressed charges against Marty for the damage to his vehicle (perhaps in juvenile court); Marty gave up on his musical career and spent decades feeling sorry for himself.
When Marty returned from 1885, he and Jennifer Parker encountered Needles at the very spot he would crash his truck. However, at the last second, Marty put the truck in reverse while Needles raced ahead, and witnessed the Rolls-Royce nearly hit Needles's truck. It was at this moment that Jennifer saw the words "YOU'RE FIRED!!!" disappear from Ito T. Fujitsu's fax to Marty, a copy of which she had taken from the McFly residence in 2015. The dismal events of Marty's future were averted.